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  • Default User Avatar

    This is because in Python 3.X map returns an iterator instead a list. In general iterators in Python are "empty" after first runthrough thus min(n) tries to run on empty iterator (emptied by max) and throws an error.
    Solution: use list(map(...)).

  • Custom User Avatar

    Python 3 is, in many ways, not backward compatible with Python 2. But, this kata is for Python 2.